可以拖拽鼠标来改变DIV层的大小的代码

作者：佳明妈来源：懒人建站 2009-12-27 人气：

老外写的拖拽鼠标来改变DIV层的宽度大小的JS代码，DIV结构配合JS和CSS。切记此代码不能在页头声明DTD

<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> 
<title>可以拖拽鼠标来改变DIV层的大小的代码_懒人建站

http://www.51xuediannao.com</title> 
<head>
<style>
{box-sizing: border-box; 
moz-box-sizing: border-box;
}
#testDiv{ 
	background-color: buttonface; 
	background-repeat: repeat; 
	background-attachment: scroll; 
	color: #3969A5; 
	height: 300px; 
	left: 30px; 
	overflow: hidden; 
	width: 500; 
	z-index: 2;             
	border: 2px outset white; 
	margin: 0px; padding: 2px; 
	background-position: 0% 50% }
body{ font-family: Verdana; 
font-size: 9pt }
#innerNice{ 
background-color: white; 
background-repeat: repeat; 
background-attachment: scroll; 
color: #3969A5; 
height: 100%; 
overflow: auto; 
width: 100%; 
border: 2px inset white; 
padding: 8px; 
background-position: 0% 50% }
</style>

var theobject = null; //This gets a value as soon as a resize start

function resizeObject() {
	this.el        = null; //pointer to the object
	this.dir    = "";      //type of current resize (n, s, e, w, ne, nw, se, sw)
	this.grabx = null;     //Some useful values
	this.graby = null;
	this.width = null;
	this.height = null;
	this.left = null;
	this.top = null;
}

//Find out what kind of resize! Return a string inlcluding the directions
function getDirection(el) {
	var xPos, yPos, offset, dir;
	dir = "";

xPos = window.event.offsetX;
	yPos = window.event.offsetY;

offset = 8; //The distance from the edge in pixels

if (yPos<offset) dir += "n";
	else if (yPos > el.offsetHeight-offset) dir += "s";
	if (xPos<offset) dir += "w";
	else if (xPos > el.offsetWidth-offset) dir += "e";

return dir;
}

function doDown() {
	var el = getReal(event.srcElement, "className", "resizeMe");

if (el == null) {
		theobject = null;
		return;
	}

dir = getDirection(el);
	if (dir == "") return;

theobject = new resizeObject();
		
	theobject.el = el;
	theobject.dir = dir;

theobject.grabx = window.event.clientX;
	theobject.graby = window.event.clientY;
	theobject.width = el.offsetWidth;
	theobject.height = el.offsetHeight;
	theobject.left = el.offsetLeft;
	theobject.top = el.offsetTop;

window.event.returnValue = false;
	window.event.cancelBubble = true;
}

function doUp() {
	if (theobject != null) {
		theobject = null;
	}
}

function doMove() {
	var el, xPos, yPos, str, xMin, yMin;
	xMin = 8; //The smallest width possible
	yMin = 8; //             height

el = getReal(event.srcElement, "className", "resizeMe");

if (el.className == "resizeMe") {
		str = getDirection(el);
	//Fix the cursor	
		if (str == "") str = "default";
		else str += "-resize";
		el.style.cursor = str;
	}
	
//Dragging starts here
	if(theobject != null) {
		if (dir.indexOf("e") != -1)
			theobject.el.style.width = Math.max(xMin, theobject.width +

window.event.clientX - theobject.grabx) + "px";
	
		if (dir.indexOf("s") != -1)
			theobject.el.style.height = Math.max(yMin, theobject.height +

window.event.clientY - theobject.graby) + "px";

if (dir.indexOf("w") != -1) {
			theobject.el.style.left = Math.min(theobject.left +

window.event.clientX - theobject.grabx, theobject.left + theobject.width - xMin) +

"px";
			theobject.el.style.width = Math.max(xMin, theobject.width -

window.event.clientX + theobject.grabx) + "px";
		}
		if (dir.indexOf("n") != -1) {
			theobject.el.style.top = Math.min(theobject.top +

window.event.clientY - theobject.graby, theobject.top + theobject.height - yMin) +

"px";
			theobject.el.style.height = Math.max(yMin, theobject.height -

window.event.clientY + theobject.graby) + "px";
		}
		
		window.event.returnValue = false;
		window.event.cancelBubble = true;
	} 
}

document.onmousedown = doDown;
document.onmouseup   = doUp;
document.onmousemove = doMove;
</SCRIPT>
</head>

<body>
<div class="resizeMe" id="testDiv">
  <div id="innerNice">
    <p align="center">请在边框处拖动鼠标看看效果啊</p>
    <p>懒人建站网收集整理</p>
    <p><a href="http://www.51xuediannao.com">懒人建站</a><a

href="http://www.51xuediannao.com">http://www.51xuediannao.com</a></p>
<p>切记 此代码 不能在页头声明DTD</p>
  </div>
</div>

<div style="width:95%; height:auto; display:block; margin:0 auto; margin-top:30px;

font-size:10pt; line-height:150%;">
<span>本代码由<a href="http://www.51xuediannao.com" style="color:#F00;">懒人建站网 收

集整理</a> </span><br>
<a href="http://www.51xuediannao.com">懒人建站 http://www.51xuediannao.com</a><br

/><br/>
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<span>懒人建站只收录实用和能提高用户体验的代码</span><br />
<span>我们只想解放出你的部分写代码时间来思考更高层次的设计，而不是要你懒惰、拼凑。

</span>
</div>
</body>

老外写的拖拽鼠标来改变DIV层的宽度大小的JS代码，DIV结构配合JS和CSS。

切记此代码不能在页头声明DTD，否则显示不正常。

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